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      I recently finished my CoreXY based CNC Laser machine and I would like to share the build log with you guys here. So here's the build log:

      The Plan
      So whole project starts with a simple requirement and as said by a good man "Necessity is the mother of invention".

      I started the project with search of fast drive systems with low torque requirement, initially I landed on H-Bot design but by further research I got to know that it require unwanted torque. To resolve H-Bot design issue there is a system called CoreXY. I found this design is followed by many 3D Printers and Laser engraves so I decided to build system based on this design.

      [​IMG]

      The Electronics
      From my past experience with GRBL I selected the electronics based on Arduino. I wanted the circuit compact as conventional Arduino Uno is very big in size, so I took Arduino Pro Mini due to small in size and same microcontroller used on it. Next thing was stepper driver as I planed to use Nema 17 (4.4Kgcm) Stepper Motors, I selected the conventional A4988 Stepper Driver.

      I fabricated the PCB at home to connect all the components together. First I tested the circuit on bread board.

      [​IMG]

      After successful testing I created the PCB at home using toner transfer method. The result was pretty satisfying.

      [​IMG]

      Finally I mounted all the components on the PCB followed by drilling process. I powered up whole setup with and PC Power supply.

      The Body
      I wanted the body to be very light in weight and rigid enough. I planned a bed less body as I wanted it to be placed on any surface that is bigger then the working area (and it also decreases the overall weight).

      I selected 3 materials 5mm Acrylic, 8mm MDF, and aluminium lengths of three different profiles (Due to lack of availability in local market).

      I used 8mm Steel Rods and LM8UU linear bearings for the linear motion. You will get a good glimpse of body with following images:

      20171012_173311.jpg
      20171012_220930.jpg
      20171013_194424.jpg
      20171013_194514.jpg

      Conclusion
      The build test was very cool as you can see in video attached. The movement is also smooth and fast. Overall weight is also very lite.

      To Do
      Mount a 3500mw blue laser module.
      mikememmi likes this.
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    • CC - Attribution Share Alike - CC BY SA
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